Let f: R2 R be defined as in Problem 1-26. Show that Dxf (0, 0) exists for

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Let f: R2 → R be defined as in Problem 1-26. Show that Dxf (0, 0) exists for all x, although f is not even continuous at (0,0).

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Discrete and Combinatorial Mathematics An Applied Introduction

ISBN: 978-0201726343

5th edition

Authors: Ralph P. Grimaldi

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Question Posted: Oct 01, 2009 01:05 AM

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Let f: R2 R be defined as in Problem 1-26. Show that Dxf (0, 0) exists for

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Discrete and Combinatorial Mathematics An Applied Introduction

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